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11ct Spinel (Round, 13.77×13.77mm, Red) vs 11ct Diamond (Round, 14.46×14.46mm, White)


Quick summary: When looked from above (face-up position), 11ct Diamond (14.46×14.46mm, round cut) appears 10% larger than 11ct Spinel (13.77×13.77mm, round cut). See below how they compare side-by-side on a ring and finger.

11ct Spinel (round cut)
vs
 11ct Diamond (round cut)
red
 
white
13.77×13.77 mm 14.46×14.46 mm
actual size
Actual size of 11ct Spinel (round cut, 13.77×13.77mm, Red color)   Actual size of 11ct Diamond (round cut, 14.46×14.46mm, White color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Red 11ct Spinel (round cut, 13.77×13.77mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
White 11ct Diamond (round cut, 14.46×14.46mm) on a right ring and finger
Your settings
Ring
 Gold
Skin tone
 Light
Ring diameter
 16.9 mm
Ring width
 3.0 mm
Finger length
 64 mm
Finger coverage
 82% vs 86%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 11ct Spinel Round (13.77×13.77mm, Red) and 11ct Diamond Round (14.46×14.46mm, White) as they would appear on a ring and finger. Adjust the ring and finger size to get an idea of how these gemstones would look on your finger.

Where to buy?

For certified gemstones, high-end gemstone jewelry, and birthstone jewelry, see Blue Nile

Face-up Size

All things being equal, Spinel will face-up slightly smaller than Diamond for a given carat weight, because it has higher specific gravity (3.6 vs. 3.52 - this means it's "slightly heavier" compared to Diamond of the same size). Face-up size also depends heavily on the proportions of the cut.

Face-up area is a measure of the size of the gem when viewed from above (as set in a ring). It tells you how big the gem is at the girdle plane.


11 Ct Spinel (Round) 11 Ct Diamond (Round)
13.77×13.77 mm vs 14.46×14.46 mm
148.92 mm²   164.22 mm²
Face-up size outline for 11ct Diamond (14.46×14.46mm, round cut)
Face-up size outline for 11ct Spinel (13.77×13.77mm, round cut)
11ct Spinel Round (13.77×13.77mm)
11ct Diamond Round (14.46×14.46mm)
Difference: 10% (15.3 mm²)
11ct Diamond (Round, 14.46×14.46mm) has approx. 10% more face-up area than 11ct Spinel (Round, 13.77×13.77mm).


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